IB/mthca: Factor out setting WQE data segment entries

Factor code to set data segment entries out of the work request
posting functions into inline functions mthca_set_data_seg() and
mthca_set_data_seg_inval().  This makes the code more readable and
also allows the compiler to do a better job -- on x86_64:

add/remove: 0/0 grow/shrink: 0/6 up/down: 0/-69 (-69)
function                                     old     new   delta
mthca_arbel_post_srq_recv                    373     369      -4
mthca_arbel_post_receive                     570     562      -8
mthca_tavor_post_srq_recv                    520     508     -12
mthca_tavor_post_send                       1344    1330     -14
mthca_arbel_post_send                       1481    1467     -14
mthca_tavor_post_receive                     792     775     -17

Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index 0e9ef24..2548250 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -1740,13 +1740,8 @@ int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
-                       wqe += sizeof (struct mthca_data_seg);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
+                       wqe  += sizeof (struct mthca_data_seg);
                        size += sizeof (struct mthca_data_seg) / 16;
                }
 
@@ -1869,13 +1864,8 @@ int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
-                       wqe += sizeof (struct mthca_data_seg);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
+                       wqe  += sizeof (struct mthca_data_seg);
                        size += sizeof (struct mthca_data_seg) / 16;
                }
 
@@ -2125,13 +2115,8 @@ int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
-                       wqe += sizeof (struct mthca_data_seg);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
+                       wqe  += sizeof (struct mthca_data_seg);
                        size += sizeof (struct mthca_data_seg) / 16;
                }
 
@@ -2253,20 +2238,12 @@ int mthca_arbel_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
                        wqe += sizeof (struct mthca_data_seg);
                }
 
-               if (i < qp->rq.max_gs) {
-                       ((struct mthca_data_seg *) wqe)->byte_count = 0;
-                       ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
-                       ((struct mthca_data_seg *) wqe)->addr = 0;
-               }
+               if (i < qp->rq.max_gs)
+                       mthca_set_data_seg_inval(wqe);
 
                qp->wrid[ind] = wr->wr_id;
 

diff --git a/drivers/infiniband/hw/mthca/mthca_srq.c b/drivers/infiniband/hw/mthca/mthca_srq.c
index b8f05a5..88d219e 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_srq.c
+++ b/drivers/infiniband/hw/mthca/mthca_srq.c
@@ -543,20 +543,12 @@ int mthca_tavor_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
                        wqe += sizeof (struct mthca_data_seg);
                }
 
-               if (i < srq->max_gs) {
-                       ((struct mthca_data_seg *) wqe)->byte_count = 0;
-                       ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
-                       ((struct mthca_data_seg *) wqe)->addr = 0;
-               }
+               if (i < srq->max_gs)
+                       mthca_set_data_seg_inval(wqe);
 
                ((struct mthca_next_seg *) prev_wqe)->nda_op =
                        cpu_to_be32((ind << srq->wqe_shift) | 1);
@@ -662,20 +654,12 @@ int mthca_arbel_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr,
                }
 
                for (i = 0; i < wr->num_sge; ++i) {
-                       ((struct mthca_data_seg *) wqe)->byte_count =
-                               cpu_to_be32(wr->sg_list[i].length);
-                       ((struct mthca_data_seg *) wqe)->lkey =
-                               cpu_to_be32(wr->sg_list[i].lkey);
-                       ((struct mthca_data_seg *) wqe)->addr =
-                               cpu_to_be64(wr->sg_list[i].addr);
+                       mthca_set_data_seg(wqe, wr->sg_list + i);
                        wqe += sizeof (struct mthca_data_seg);
                }
 
-               if (i < srq->max_gs) {
-                       ((struct mthca_data_seg *) wqe)->byte_count = 0;
-                       ((struct mthca_data_seg *) wqe)->lkey = cpu_to_be32(MTHCA_INVAL_LKEY);
-                       ((struct mthca_data_seg *) wqe)->addr = 0;
-               }
+               if (i < srq->max_gs)
+                       mthca_set_data_seg_inval(wqe);
 
                srq->wrid[ind]  = wr->wr_id;
                srq->first_free = next_ind;

diff --git a/drivers/infiniband/hw/mthca/mthca_wqe.h b/drivers/infiniband/hw/mthca/mthca_wqe.h
index e7d2c1e..f6a66fe 100644 (file)
--- a/drivers/infiniband/hw/mthca/mthca_wqe.h
+++ b/drivers/infiniband/hw/mthca/mthca_wqe.h
@@ -113,4 +113,19 @@ struct mthca_mlx_seg {
        __be16 vcrc;
 };
 
+static __always_inline void mthca_set_data_seg(struct mthca_data_seg *dseg,
+                                              struct ib_sge *sg)
+{
+       dseg->byte_count = cpu_to_be32(sg->length);
+       dseg->lkey       = cpu_to_be32(sg->lkey);
+       dseg->addr       = cpu_to_be64(sg->addr);
+}
+
+static __always_inline void mthca_set_data_seg_inval(struct mthca_data_seg *dseg)
+{
+       dseg->byte_count = 0;
+       dseg->lkey       = cpu_to_be32(MTHCA_INVAL_LKEY);
+       dseg->addr       = 0;
+}
+
 #endif /* MTHCA_WQE_H */